Bathroom exhaust options

My bathroom had a ceiling exhaust fan that needed replaced. I did it once already and it was painfull... VERY little space in my attic to do properly. Here is my q. I was going to install an inline duct fan into my wall that will directly vent to the outside. Easy to replace if needed in the future. I'd like to install it above my bathroom window, but there is very little room. I know its not the best option, but would installing it approx 2 feet off of the ground below the window be ok? Or I could even install it right in the shower stall area. I'd have a plastic cover over it so there'd be no chance of getting zapped. I'm guessing the 'in the shower area' idea is not the safest option.